Elevator systems transferable between modes of operation



Dec. 20, 1955 .1. suozzo ETAL 2,727,591

I ELEVATOR SYSTEMS TRANSFERABLE BETWEEN MODES OF OPERATION Filed March 30, 1953 6 Sheets-Sheet 1 LI Bis II 1 BFSP bb Bl3 BFSC DEF. DFP BDERB BDFP F41 UF F El Bg E P 1] BUHEP BEI BE aw BF BV BDR 80$ BTR2 WITNESSES:

INVENTORS Zdflf I JOhn Suozzo and '9- Allen A.Rosenkrons.

ATTORNEY 6 SheetsSheet 2 an 8 m v. Ton M mu R O. w fim I Aj A n h 0 M J Am lo ol m2 k1 F0 A .m F

J. SUOZZO ETAL Dec. 20, 1955 ELEVATOR SYSTEMS TRANSFERABLE BELWEEN MODES OF OPERATION Filed March 30, 1953 ATw:

WITNESSES: 5% w/zfi y. vi 7 Dec. 20, 1955 J. suozzo ETAL ELEVATOR SYSTEMS TRANSFERABLE BETWEEN MODES OF OPERATION 6 Sheets-Sheet 4 Filed March 50, 1953 I I I I I I I I I I I I I I I I I I I I I I I I I I I 2 m m k? 1 w; I I I I I I I I I I I I I I I I I I I I I I I I I I I I i ilo Ea I I I I II in E5. E2 mam zmiw E3 m3 II I I I I I I I I I I I I II r E5 255 E3 JLWVE 02 Om POM mQN III I III I I I I IIIII I I II II I QTETEQN mom zmow mQm I I I I I I I I I I I I I I I I I I I I I I I I Ap man zmmn Eon 9 IIIIII II I I I I I I I I I I E I -89 zmoQ no mo: IIIIIIIIIIIII flg mm 359 I; o uv m3 is 2; w; vfinlh LV ux mx m? 313 wx m III I II -ozIVEo. m9 mow IIIII Mi QQ EQN mom mum I I E1 {on muoT kT 5m 50. E09 muzi o mu: Eu:

WITNESSES: id 72 INVENTORS John Suozzo and Allen A.Rosenkrons.

ATTORNEY Dec. 20, 1955 J. suozzo ET AL 2,727,591

ELEVATOR SYSTEMS TRANSFERABLE BETWEEN MODES OF OPERATION Filed March 30, 1953 6 Sheets-Sheet 5 LI L2 u 1.2-

L Nomi BIICRZ :c-uns IODR3 BiOCR2 9uR3 I i 1 l B98 BJ B152 I B3 B15 0 W 3 M4 M7 8M7 I53 B33 B133 H p TR3 B35 BTR3 Ll L2 Ll L2 WITNESSES: INVENTORS John Suozzo and 574 yaw;-

Allen A.Rosenkrons.

Kym

ATTORNEY Dec. 20, 1955 J. suozzo ETAL 2,727,591

ELEVATOR SYSTEMS TRANSFERABLE BETWEEN MODES OF OPERATION Filed March 30, 1953 6 Sheets-Sheet 6 n: 0: 0: II (I II I- II 0:

0 In a Q o o 3 3 I: g Q 8 1 2 3 9 I0 I oo 2 m N I- Q I I l l I g I l I I cu I I 2 N I l 99 m 2 I I I I m I o 0: o I I 9 9 I l I I I I l N I 5* I I N I m 2;

N I Y I I 5 5a 1 I i g In N a: I I m g I m I]: I I I I N I I I0\ I 1- f I u'u v FIg.3A. m

I 5: y 8x 2X A I g\ I? 3 h-l I) E WITNESSES: INVENTORS John Suozzo and Allen A.Rosenkrons.

ATTORNEY Zara/wa zteringscalls for :floors sdesired elevator .car. ln' a'dditiom ficioi call registerihg ztmay :include :up fiooraeall regtstringl nteans yvhtc to. such floor. 'for' and moving. theIelevator icar away 'from the door. To .facilitate'entryiof the'tattefidant into the elevator carfthe invention. provides-that- 'the actuation United States Patent O ELEVATOR SYSTEMS ITRANSFERKBLE' BETWEEN MODESDEUPERATIUN John Suozzo; sParamusnand Allen AU Ro'seiikrans, 'Siim- :mit, N..,J.; assiguors' tor -Westinghouse*Electrie'Gorporation, EastPittsburgh; tPa.,- a'corporntion Pennsylvania Application Ma'I'cBSO;19535'Si'iaYNo. 15,648

12 Claims. (Cl. 187-29) L This.-invention'irelatesi :to elevator i-systems' and it has I particulars-relation to elevaton'systems arranged for opera- .tion .with'ior-withouttelevator attendants.

. In elevator systems iti is cornnronpriacticeto provide call registering :smeans'tfor *1 registering calls: for" floors at which elevator car is to stop. Such caIrregi'sw'tng means may include icarrcallaregistenin smeans *whi'eh ar operable from withinaanrelevator ca y: passeng ers withindhe "cans may .be provided ifor i the purp'ose bf permitting-prospective passengers atxthewarious fl'o'ors' ofi a structuretd register calls for-elevator tservice. 1"Floomallregistering means be operated if elevator service in the up dire en mired. In addition, .dowmfloor call registefiin me" nsmay benprovidedafor operationc by prospeetive elevator sefivi'cetint-he dcwnrdirectien desired.

:wIf an elevator system =is designed for bperatiori'Wvithout I attendantsean.elevatontcar automatitiallv departs from a afloor atlWhlCh it has stoppediollowin vator soar doors. :(Duringtits opei afion the elevator ear stops. at; each floor which it: approaches for o'vhiclr a call for service is registered which may beansw'ered by the elevator car.

11f -,the elevator system istarranged for operation with attenda'ntswan elevatort ear can depart trom a floorat awhich it \hasestopped only-'folbwing amanual 'tiperation performedvbwthm elevaton' cantat tehdant who 'isi lobated within the=car.

In..accordance rwith the iinveiition a A erevator-sgistem is arranged for operationwi'th or Witho titteiidahts' 3 To this end a transfer deviee ais providd which may bactu- :ated; foritthei purpose of.-itransferring 'the systetn rdm a condition=wherein1it=operates will-tout a-ttentarits td-a cons dition- =wherein it isioperatedawi'th attendants.

'- If the :transfernfrom ioperation withoi'it titteiidaiits to operation'fwith tattentlants: is eneexed whne an"?elevato1' car is stopped at an intermediate floor fo1- the -purpo'se="-of discharging: its? 'tlastt passenger, an a'ttiendant ma {proceed hez-purpose 'of"enteriflg the elevator oar he t nsferdevice can result iin a transferrin'g' operation 'nlyafter the"-levator car has proceeded to a predetermined floor. W-ith such amarrangementi'the attendant y remain on the predetermined fioor withitheossu tic that 't elevator car :will, proceed to 'his' floon'befdre' the transferring opera tion is completed.

If desired the transfer device also"ifitidduos a' furtiier alteration :in the operation ofthe elevator "system. For example, when the 'elevator system. is placed "under-the 1 control of attendants, an elevator "ciarniia'y 'he T'p evrited fromnresponding to c'llsneg'istered'bythe fiti'dr cal tering means. v

n is therefore an object 6f "the notiiucm "to pristine fegis- Patents-xi Dec. 20, 1955 shown'in straight-line form of portions of an elevator Zsystem' embodying the invention.

Figs. 1A-,- 2A and 3A are key representations of electromagnetic relays and switches employed in the system of Figs. 1, 2 and 3. If Figs. 1A, 2A and 3A are placed in horizontal alignment respectively with Figs. 1,- 2 and 3 it will be-found that corresponding coils and contacts 0f T Car-call stopping relay.

the electromagnetic relays andswitches of the two sets of figures will be substantially in horizontal alignment; and

Fig. 4 is a view in front elevation withparts shown schematically of an elevator car employed in the system of Figs} 1; 2-and 3.

'In order to simplify the presentation of the invention 1 a-number ofconventions have beenadopted. Although the invention may be'applied to an elevator system'having any desired number of; cars and serving a structure having any desired number of floors, the invention can be described adequately with reference to a system-having two' elevator cars serving a structure having eleven floors. The two cars are identified by the reference characters A" and B.

Since the circuits forthe two cars A and Bare similar,

- the invention will bedescribedprimarily with reference to the elevator 'car A. Similar components for the elevator'car will be'identified by the same reference characters employed for the corresponding components associated with elevator-earA preceded by the letter B. For

' example, the reference characters U and BU designate respectively the up switches for the elevator cars AandB. The-various electromagnetic relays and=switches each 1 may have several contacts. A relay or switch will be'identified by the reference character for the relay or switch followe d by a'numeral'specific to the set of contacts. Thus,

thereferen ce characters Uland U3 designate the first and third sets of contacts for the up-switch U associated with the elevator car- A.

A 'relay'or switch may have make or front contacts which close when therelay or switch is energized and deenergized and dropped out. A relay or switch alsom'ay picked up and which are-open when the relay or switch-is 'have back or break contacts which are closed Whenthe relay or switch is deenergized-and dropped out and which are open when the relay or switch is energized' and picked up.

To facilitate the presentation ofthe invention certain apparatus of the elevator system is listed as'follows:

Appa'flitrisfor elevator 'car A V Speed relay.

U d Up-switch.

M Running relay. Down-switch.

"E -l Inductor slowdown relay.

I a Inductor stopping relay. G. as Holding relay.

Up-direction relay.

- a Down-direction relay. Non-interference relay. Door safety relay. Manual start relay.

Apparatus for elevator car A--Continued Referring to the drawings, Fig. 1 shows the elevator car A which is connected to a counterweight through one or more flexible ropes or cables 11 passing over a sheave 12. The sheave 12 is secured to a shaft 13 which also carries a brake drum 14 and the armature 15A of a motor 15 employed for moving the elevator car. Although various types of motors and motor control systems may be employed, it will he assumed that the motor 15 is a direct current motor having a field winding 15F which is connected across two buses L1 and L2 for energization. The buses L1 and L2 represent a source of direct-current electric energy.

It will be assumed that the control for the electric motor 15 is a variable-voltage control which includes a direct-current generator 16 having an armature 16A, a series field winding 16S and a separately-excited field winding 16F. By inspection of Fig. 1 it will be noted that the armatures 15A and 16A and the series field winding 168 are connected in series in a loop circuit.

The brake drum 14 has associated therewith a springapplied electromagnetically-released brake shoe 148 of conventional design. The brake shoe is released from the brake drum upon energization of a brake coil 17. This brake coil is connected for energization across the buses L1 and L2 through make contacts U1 or make contacts D1 of the up-switch U or the down-switch D.

Because of the large number of circuits which are controlled in accordance with the movement of the elevator car, it is conventional to provide the system with a floor selector PS. The floor selector includes a panel PS? on which rows of contact segments are mounted. The contact segments are insulated from each other. Although. a large number of rows of contact segments are provided only two of these rows are illustrated in Fig. 1. One of the rows illustrated in Fig. 1 includes contact segments al to all. The second row illustrated includes the contact segments hi to I111.

The panel FSP has associated therewith a carriage FSC which moves across the panel in accordance with movement of the elevator car A but at a greatly reduced speed. To this end the carriage FSC is coupled to the shaft 13 through suitable gearing 13. Consequently, the carriage moves vertically as viewed in Fig. l in accordance with vertical movements of the elevator car A.

The carriage FSC carries a separate brush for each of the rows of contact segments. For example, the carriage has a brush art which successively engages the contact segments al to all as the elevator car moves from the first to the eleventh floor ofthe structure. Similarly, the brush bb is carried by the carriage and successively engages the contact segments bl to 1211. Circuits are associated with the brushes and contact segments for the purpose of controlling the operation of the elevator car A.

The direction and speed of movement of the elevator car A are determined by the direction and magnitudei'of the energization of the field winding 16F. This field winding is connected across the buses L1 and L2 through a resistor RBI. and contacts of a reversing switch. The reversing switch includes make contacts U2 and U3 of the up-switch U. These contacts are closed to energize the field winding with proper polarity for up travel of the elevator car A. The field winding also may be energized through make contacts D2 and D3 which are closed to 4 energize the field winding with proper polarity for down travel of the elevator car. Closure of make contact V1 of a speed relay V shunts the resistor RBI to increase the speed of the elevator car.

Mounted for movement with the elevator car A are an inductor slowdown relay E and an inductor stopping relay F which may be of conventional construction. For example, the inductor slowdown relay E has two break contacts E1 and E2. For the break contacts E1 to open, two conditions must be satisfied. The coil of the inductor slowdown relay E must be energized and the relay must be adjacent an inductor plate UEP. One of the inductor plates UEP is associated with each of the floors at which the elevator car A is to stop while traveling in the up direction.

When the elevator car While traveling in the up direction is to stop at a floor which it is approaching the coil of the inductor slowdown relay E is energized. When the inductor relay E reaches the inductor plate UEP associated with such floor, a magnetic circuit is completed which results in opening of the break contacts E1. The

contacts E1 thereafter may remain open until the coil E is deenergized.

In a similar manner, an inductor plate DEP is associated with each of the floors at which the elevator car A may stop while traveling in the down direction. If the elevator car A is to stop at a floor while traveling in the down direction, the coil of the inductor slowdown relay -E is energized. When the inductor relay reaches the inductor plate DEP associated with such floor, the break contacts E2 open and remain open until the coil is deenergized.

The inductor stopping relay F is similar in construction to the inductor slowdown relay E and is similarly associated with inductor plates UFP and DFP. It will be understood that an inductor plate UFP is associated with each of the floors at which the elevator car A may stop while traveling in the tip-direction. One of the inductor plates DFP is associated with each of the floors at which the elevator car may stop while traveling in the down-direction.

As the elevator car approaches a floor at which it is to stop, the inductor slowdown relay E opens one of its sets of contacts a suitable distance in advance of the floor to initiate a slowdown dperation of the elevator car A. The elevator car A then continues to approach the de sired floor at a reduced speed until the inductor stopping relay F opens one of its sets of contacts to stop the elevator car accurately at such floor.

When the elevator car A is traveling in the tip-direction, the speed relay V is energized through make contacts U4 of the up-switch U, a limit switch 20 and the break contacts E1 of the inductor slowdown relay E. The limit switch 20 is biased into closed condition and is cam-operated to open as the elevator car reaches its upper limit of travel.

If the elevator car A is set for travel in the down direction, the speed relay V isenergized through make contacts D4 of the down switch D, a limit switch 21 and break contacts E2 of the inductor slowdown relay. The limit switch 21 is biasedinto closed condition and is cam- .operated to open as the elevator car A reaches its lower limit of travel.

To permit registration of calls for floors desired by passengers within the elevator car or by a car attendant, push buttons 1C to 11C are located within the elevator car A. Circuits associated with these push buttons will be discussed below.

Floor calls are registered by operation of suitable push buttons located at the various floors. For example, a push button 2U is located at the second fioor. A similar push button identified by the letter U precededby a numeral designating a floor is located at each floor from which a prospective passenger may desire to travel in the tip-direction. For down service a push button 2D is J 'they maybe ower-operateat b the elevator car A By fere n P is in its closed position. The door bymeans of an arm 22A which ergization with proper polarity"'toopeh thedoor position Under these circumstancestheup s J closed condition and is 'camoper'ated re en as the the up switch U picks upi i'tfclosesf its :-U- to establish a holding circuitparound t v tacts Wland the coritac'tsZOTl and 80 1;""

around the contacts X1, 80 1 and 70T1.

located at the second floor. A similar push button idenx tified by the letter D precededbyfa fldbrdsignating numoral is locatedat each-floo'r fromfwhich a prospective 1. passenger mavdesireto travel'qin the down direction. 5

. It; will be understoodthat the elevator'car A may be provided with doors which are operated in any conventional manner. Thus the doors may be manually opened and manually *closedg "They" may be biased towards closed position and manually o A suitable door operator is that the elevaton'cai 22M through suitable gearing. T

s free end pivotallyconnected to fa linkj'22Lwhich in turn is pivotally connected to the door 22. The motorlZM may be a direct-current riiotor"which is energizedthrough a reversing switch. lt-"wilkbe assumed that he rn'otor has'a permanent-magnet field'andi tha Cipqation'of th'e' reversing switch controls the'di rec'tio J {the rotation of the motor to open and cl'ose the door 22; ers' ing switch comprises-contacts the do or-control relay'45. Break contacts of this rlay""conr;iect'th e motorfor encontactsof the relay ceniiecetheyrpemr fo energ with proper polarity to close "th door.

- switchZZSis biased towards op n"con'ditio tioned to be closed as the door reaches I g The elevator car A is provided with a runningrelay M which can be energized only if makecontactsDRl the make contacts W1 of ant -direction relayareclos'ed.

ning relay M are energized a; f 'n lq' 'i 8041? WI; 113... U, M,1 .R1., L2 The break contacts 70T 1 are associated with a interference relay 70T and "are effective wlieI Qthe system is arranged for operationwithout attendants/[The make contacts 80-l are effective: foi starting the elevator' car A when the can-A "is ar'r'snga' ;far operation with an attendant. "The limit swabs 23 biase into elevator car reaches its uppen'limit of V In somewhat similar mannerithe running relay may be energized when the elevator car A is jset f or down travel through the-following eif -s r1, van or sit-4, 113, 24, D,,M, p111, L2

The limit switch 24 is biased into closed condition and is ca1n-operated to open as the elevator carieac'hesjits lower limit of travel. When"thedow'n switch D picks up, make contacts D5 close to establish a old' 'g circuit To permit energization off the holding relay G, indtictor slowdown relay E and the-inductor stoppingj relay F, make contacts M1"oftherunninglrelay must be closed. In addition, one ofithel 'se tsjof make con- 'tacts J1 and S1 must be closed. The iiiakeicon. 'tacts T1 are closed when the elev'ator carA is to s t'op at a floor in response to'a registered car call. make contacts J1 are closed when"nofcallsireinain to he answered by the elevator car A fi o'rs ab'ove the position of the elevator' car. The

closed when the elevator car Ais to stop at aflopr in res'ponse to "a registered floor calla; These three sets of 'contacts' r'nay be shunted by -make'contactsf "'holding'relayG. V

The up-direction relay W is energized asfollows:

of: h

l L De, X2, J2, 25, L2

, The. limit switch 25 is biased to closed condition and 0 through the make contacts M3 of the ,-1 'll1ll'li11g relay M 'or through break contacts TR1 of a. car transfer switch TRJ fThis relay has a time, ,delay infdropwut which iscam-operated to open as the elevator car Areaches its upper, limit of travel. -When the running relay M picks up, make contacts vM2 close to shuntthe break contacts J2.

The down direction .relay is energized throughthe circuit:

L1, U6, W2, X, 26, L2

The limit switch 26 is biased to, closed condi tion and is cam-operated to open as the elevatqr carrreaches i s lower limit of travel.

The non-interference relay 7 0T may beenergized either "'may be provided in any suitable manner. For present 1 purposes it will be assumed that the-tirnehdelay isob- 5 tain'ed by connecting a resistonREZ, acrossthecoil of the relay 70T. If the elevator car A stops; at a floor While it is condition ed for. operation without an attendant,

" "the elevator can not be dispatched frorn. the floor. until the non-interference relayjflTdrops out to close its ,break The door safety relay DR is energized throughthe safety switch 228 and throughhsimilar safety switches used for hoistway doorsassociatedfwithlthe elevatopear 5A if such hois tway doors are provid edn lt will be understood that the door safety relay DR; can be energ'iz'ed and picked up only it all of the doors associated with the elevator carare in closed condition.

' If the elevator carl A is 'arraugedfor operation .by a car attendant the break con'tacts ,TRZ are closed to permit energization therethrough of thernanual start rela'y'fii). The energizing circuit for this relay is completed through a ear switch 80S which, is located within the elevator car tion of the car-call push button In the upper part of Fig. 2 circuits arejllustrated, for

registering car calls. Since the circuits associated with the various floor sare similar,,such circuits are-illustrated in Fig. '2 only for the first, second, third, tenthancl eleventh floors. The. car-call buttons. 16 to 11C; have asso- ,ci ated.therewith car-call registering relays 1CR to 11CR ,and contact segments a! to all and b1 tob11 which are associated wi'ththe. floor selector FS of Fig. 1. When any of the car-call buttons is actuated, an energizing circuit is completed for its associated car call registering relay through one of the sets of makecontacts" W3 or X3v For example, if the elevator car is set' tor up travel, the make contacts W3 are closed. Upon-operafor the -third-- floor the following circuit is established:

L 3 C W L When energized, the car-call. registering relay SCR closes its make contacts 3CR1 to establisha holding circuit around the push button 3C. In addition, "the-closed j contacts connectthe contact segments=a3 and b3tothe 65 v ha L Assumingthat the elevator car A is proceeding in the up direction, the make contacts 1W4 aud-M4-are closed.

Before the elevator car A reaches the third-floor, the

brush aa reaches the contactsegment a3 .and the engagernent of the brush and .segment completes an -en ergizing circuit forthe car-call stopping-relay'T. This relay then initiates ar-stopping operation of the'elevator V car A at the, third'fioor. As the c'ar..stops the brush aa may pass slightly beyondthe, contact segment a3.

Had the elevator carA been set for down'travel thc ass-1,691

make contacts X3, X4 and M4 would be closed. If the elevator car A approaches the third floor under such circumstances and with a car-call registered for the third floor, the engagement of the brush bb with the contact segment b3 (which occurs before the elevator car A reaches the third floor) would complete an energizing circuit for the car-call stopping relay T. As the elevator car A reaches its limit of travel in either direction, the make contacts W3 and X3 would be momentarily open to reset any of the energized car-call registering relays 1CR to 11CR.

The lower portion of Fig. 2 illustrates the floor-call registering circuits for the elevator cars. Because of the similarity of the circuits, up-fioor-call circuits are illustrated only for the first, second and third floors and downfloor-call circuits are illustrated only for the second, third, ninth, tenth and eleventh floors.

Floor-call circuits for stopping an up-traveling elevator car A are associated with contact segments 02 to all and d2 to dll which are incorporated in the fioor selector P8 of Fig. 1. Let it be assumed that a floor call is registered by operation of the floor push button 3U by a prospective passenger at the third floor. Such operation of the push button results in energization of the floor-call registering relay SUR. This relay closes its make contacts 3UR1 to establish a holding circuit around the push button 3U. The closure of the make contacts EURl connects the contact segment c3 for the elevator car A and the contact segment B03 for the elevator car B to the bus L1. If the elevator car A is traveling up, the make contacts W5 are closed and it will be assumed that the make contacts ISl are closed. As the elevator car A nears the third fioor the brush cc engages the contact segment 03 to complete an energizing circuit for the floor-call stopping relay S. This relay then initiates a stopping operation of the elevator car. As the elevator car stops the brush cc may pass slightly beyond the contact segments c3. Had the elevator car B answered the call at the third floor the engagement of the brush Bcc with the contact segment Bc3 would have completed an energizing circuit for the relay BS.

As the elevator car A stops at the third floor the brush dd engages the contact segment :13 to complete the following circuit:

Ll, SURl, 3URN, [13, dd, W6, M5, 151, L2

The coil for the relay 3UR and the cancelling coil 3URN are energized to produce magnetomotive forces acting in opposition to each other, the coils being wound on the same core. celling coil SURN resets the relay 3UR. Had the elevator car B answered the call at the third floor, its brush Bdd would have engaged the contact segment BD3 to complete an energizing circuit for the cancelling coil SURN.

The floor-call registering circuits associated with the up push buttons for the remaining floors will be understood from the discussion of the circuits for the third floor. Since the push button MD is intended to stop an uptraveling elevator car at the upper terminal floor, the circuits associated therewith are similar to those associated with the push button 3U.

The floor-call circuits for stopping a down traveling elevator car have associated therewith contact segments incorporated in the floor selectors. For example, these circuits have associated therewith the contact segments 21 to e and 1 to 10 which are incorporated in the floor selector P8 of Fig. 1.

Let it be assumed that a prospective passenger at the third floor operates the push button 3D to register a downfloor call. Such operation connects the down-floor call registering relay 3DR for energization and this relay closes its make contacts 3DR1 to establish a holding circuit around the pushbutton. In addition, the make contacts Consequently, the energization of the can- 3DR1 connect the contact segments f3 to the bus L1.

8 contacts 3DR1 to the bus L1. If the elevator car A is traveling down, the make contacts X5 and X6 are closed and it is assumed that the make contacts 181 are closed. As the elevator car nears the third floor, the brush 1? engages the contact segments f3 to complete the following circuit:

L1, 3DR1, f3, 7, X5, s, 181, L2

The energized floor-call stopping relay S now initiates a stopping operation of the elevator car A at the third floor. As the elevator car stops, the brush fi may pass slightly beyond the contact segment f3.

As the elevator car A stops at the third floor, the brush 22 engages the contact segment 23 to complete the following cancelling circuit:

L1, 3DR1, SDRN, e3, ee, X6, M5, 181, L2

The cancelling coil SDRN acts in opposition to the coil of the relay 3DR for the purpose of resetting the relay. The down-fioor-call registering circuits associated with the remaining fioors operate in a similar manner and will be understood from the discussion of the operation of the circuits associated with the push button 3D.

Since the up-floor push button 1U for the first floor is intended to stop a down-traveling elevator car, it is associated with contact segments in the e and 1 rows of the floor selector. Although it is labeled an up push button, it operates in the same manner as the push button 3D to stop a down-traveling elevator car.

The upper part of Fig. 3 illustrated circuits for initiating a reversal of an up-traveling elevator car if no calls remain above the elevator car which can be answered by such car. As shown in Fig. 3, a call-above circuit 39 is provided which includes in series break contacts of all of the floor-call registering relays and of all the car-call registering relays for the elevator car A for floors above the first fioor. The circuit 30 is associated with the row of contact segments g2 to gll which are located in the floor selector P5 of Fig. l. The contacts of the floor-call registering relays and car-call registering relays for floors above the position of the elevator car A are located in the circuit 30 above the position of the brush gg.

The high call reversal relay I is connected through make contacts W7 of the up-direction relay W and make contacts 182 of the in-service switch IS between the brush gg and the bus L2.

Let it be assumed that the elevator car during up travel is approaching the tenth floor, the make contacts W7 and 152 are assumed to be closed. It will be noted that the contact segment g10 for the tenth floor is connected to the bus Ll through the break contacts IOURZ, 11CR2 and 11DR2. If these contacts are all closed, the engagement of the brush gg with the contact segment glti results in energization of the high-call reversal relay J and this relay picks up to initiate a reversal of the elevator car A at the tenth floor. However, if any of these three sets of break contacts is open, it follows that a call is registered requiring travel of the elevator car above the tenth floor. Under such circumstances the high-call reversal relay I can not be energized and the elevator car proceeds to serve the registered call for the higher floor.

As a further example, the contact segment g9 is connected to the bus through the break contacts 9UR2, IGCRZ, illDRZ, ltlURZ, llCliZ and HDRZ. These contacts are associated with all of the call registering relays which can be answered only by travel of the elevator car above the ninth floor. Let it be assumed that none of these relays has been energized to register a call. Under such circumstances, if the elevator car A is traveling up towards the ninth floor, the engagement of the brush gg with the contact segments g9 completes an energizing circuit for the high-call reversal relay -However, had a call been registered requiring further up travel of the elevator car such as a car-call 9 for the eleventh floor, the break contacts 11CR2 would be open to prevent energization of the high-call reversal registered car call for the Break contacts of the call registering relays and concussion and the illustrationof' the remainder ofthe'cir- -cuit. i

As previously explained, the elevator car door is controlled by the door-control relay 45. The relay 45 is connected for energization through the normallylclosed switch 31, and through make contacts 802 when the elevator car is on attendant operation or break contacts 70T2 when the" elevator caris on non-attendant operation. The switch filmay be located in the elevator car A and may be manually operated before the elevator car door is completely closed to reopen the door.

Uponenergization the 1 door control relay 45 closes its make contacts di t to partly complete a holding cireuit which-is completed through the make c'ontactsMG of the running relay. 7 p

When the elevator car A is in service, the manuallyoperated switch 32 is closed to connect the in-service relay 18 for energization. When energized, the relay closes the make contacts 183 to complete with the lim- .it switch 33 a holding circuit around the manually-operatedswitch 32. The limit switch 33 is biased to its closed condition and is designed to be cam-operated to open when the elevator car reaches a predetermined floor such as the first floor. Consequently, if the switch 32 is opened while the elevator car is away from the first floor, the elevator car will remain in service until it reaches the first floor to open the limit switch 33, which.

in turn, opens the holding circuit for the in-service relay 18.

Preferably make contacts M7 of the running relay M i are connected around the limit switch 33. With this provision, if the elevator car is in service it will remain in service until the switch 32 is opened, the limit switch 33 is opened (i. e. the car is at the first floor) and the I contacts M7 are open (i. e. the car is not set to run).

pare car transfer switch TR for -tion.

Byinspection of Fig, 3 it will be noted that the operation of the in-service switch IS to its pickedup condition-results in closure of the make contacts 184- to prea subsequent energiza- As long as the car transfer switch TR is deenergized the elevator car A is arranged for attendant operation. If the manually-opera le switch 34 is operated to complete with the make contacts 154 an energizing circuit for the car transfer switch TR, the transfer switch TR then modifies the control circuits of the elevator car A for nonatte'ndant operation.

In picking up, the car transfer relay TR closes its make contacts TR3 to complete with the limit switch 35 a holding circuit for the car transfer relay. The limit switch is biased to its closed condition and is cam-operated to'open when the elevator car is adjacent to a predetermined floor such as the first floor. Consequently, once the elevator car A is placed on non-attendant operation it can not be restored to attendant operation unless the elevator car A is adjacent the first floor to open the switch 35.

In order to control the transfer of the entire bank of elevator cars'between attendant and non-attendant operation, a bank transfer relay N is arranged to be energized or deenergized by operation of a manually-operable switch 36. Thus if the elevator cars A and B are in-service, the make contacts lSd and B154 are closed. If the manually-operable switch 36 is operated to energizethe bank transfer relay N, the make contacts Nland N2 are closed to complete energizing circuits for the car transfer relays Although "the response of the ivat'r v TR and BTR. Such energizations of car transfer relays Places the st set s r .B. bsthmtnon-at nd operation.

system under various conditions may ascertained from the drawings and from the foregoing discussion of the drawings it wlll be"helpfultoconsider so e typical operationsof thejsystern." n will peasants; initially r11 th Y I ranged ferried-attendant operation. Under such circumstances the bank transfer relay N (Fig. 3)'.is, energized. The in-service relays IS and BIS also are energized under the assumed conditions. Although: the switchesjd and B34 are assumed to be open, the contacts N1, IS4, NZjand BIS-4 are all closed and consei uentlythe car transfer relays TR and BTR are picked up and energized.,;

Inasmuch as the l t-service relay IS is picked up, the make contacts 181 (Fig. 2) are closed san the elevator car A can respond to'registered floor calls. Also;.make contacts 152 (Fig. 3) arel closed-and the eleyatorcar A consequentiy is conditioned to reverse when no ,call, remains to be answered for a floonabove the position of the elevator car A. V 1 ,It will be assumed that the elevator car A is positioned at the first floor and that its doors are open. Under the assumed conditions the up direction relay W is energized. It will be noted that the break contacts TRI (Fig; ;1) are open and. that non-interference relay-701" is under the control of. themake contacts M3. The breakcontacts T112 are open and the manual. start relayiitlis ineffective .for controlling the operation..lof the elevator car.- Inasmuch as the doonof the elevator-car is-assumed to be open, the switch 228 is open. It.-willbe--understood;fur

therthat since theelevator car A is at the first fioor;- limit call push buttoncornpletesan energizing circuit for call fi istering relaySCR and thisrelay closesits make contacts 3CR1 to establish .a r'P hbu on :0.

holding circuit aroundthe In. addition, the break contacts 3GR2 .Fig. 3),in the callabove circuit 30 open.

Closure of the break When the non-interference relay 70'1" (Fig. times out it closesits breakcontactsfitlTL and-'70T2 (Fig. 3). contacts .7tlT2- completes "with the v jswitch 31 an energizingcircuitofor the door controlrelay of rfiieasing the elevator brake". tacts U2, andUSc-lose to connect the field winding 16F @Sand this relaypicksupto connect the doorrnotor ZZM (Fig. 4) for energization .with proper polarity to close the door 22. The relay 45 also closesits-make contacts 45-1 (Fig. 3) to prepare partially a self-holding--circuit.

As the door 22 (Fig. 4,),reaches its fullyclosedposition, it closes the. switch 228. ("By reference to Fig. 1 it will be noted thatthis switch is'intcircuitwith the door safety relay DR. it will be assumed. that all of the hoistway doors employed ,for the elevator. car A-arein-olosed condition and that the closure of the switch 22S.c0 mpletes an energizinglcircuit forthe door safety. relay DRr. This relay closes its makecontacts DRLto complete with the closed Q Q iS ,mTlot women-interference relay-the lgcircuit; it M 1-,...

' 5 LI, '70T1, W1, F1, 23, U, M, DRI, L2

The up-switch U is now'eiie'rgiz'ed aiid 'cl os es its make contacts U} to, energizethe brake coil 17 for the purpose In addition, make confor energization through theresistorREl th prot polarity for up traveltof the elevator car-A.

,Make contacts U4 close .to complete with the limit switch 20 and thev break contacts an energizingcircuit for the speed reiay V. This relay. closes itsgmake contacts V1 tq,,shunt the. resistor REL and conditionthe e1evat0rcar for full speed operation in the up direction, C;losure. of make gization.

11 contacts U establishes a holding circuit around the contacts 70T1 and W1. Opening of the break contacts U6 has no immediate efiect on the operation of the system.

The running relay M closes its make contacts M1 to prepare the relays G, E and F and for subsequent ener- Make contacts M2 establish a holding circuit around the contacts J2 of the high-call reversal relay J. Make contacts M3 close to energize the non-interference relay 70T.

Closure of the make contacts M4 (Fig. 2) and opening of the break contacts M5 have no immediate effect on the operation of the system. Closure of the make contacts M6 (Fig. 3) completes with the closed make contacts 45-1 a holding circuit for the door control relay 35.

It will be recalled that the closure of the make contacts M3 (Fig. 1) energizes the non-interference relay 70T. This relay upon energization opens its break contacts 7 GT1 and 70T2 (Fig. 3) without immediately affecting the operation of the system.

The departure of the elevator car A from the first floor results in closure of the limit switches 21, 24 and 26 (Fig. l) and the limit switches 33 and 35 (Fig. 3). Such closures have no immediate eflect on the operation of the elevator car A.

As the elevator car A proceeds at full speed towards the third floor, it is assumed that a prospective passenger at the tenth floor operates the down-floor call push button D (Fig. 2) to establish an energizing circuit for the down-floor call registering relay ltlDR. The relay ltlDR closes its make contacts 10DR1 to establish a self-holding circuit. In addition, the break contacts IODRZ and ltlDR3 (Fig. 3) open in the call-above circuits 3t) and B30.

As the elevator car nears the third floor, the brush aa (Fig. 2) engages the contact segment a3 to complete the following circuit:

L1, 3CR1, a3, aa, W4, T, M4, L2

As a result of its energization, the car-call stopping relay T closes its make contacts T1 (Fig. l) to complete with the closed make contacts M1 an energizing circuit for the relays G, E and F. The relay G now closes its make contacts G1 to establish a holding circuit around the contacts T1.

The elevator car A continues its approach towards the third fioor and the slowdown inductor relay E finally comes into horizontal alignment with the inductor plate UEP for the third floor. This completes a magnetic circuit for the inductor relay E which results in opening of the break contacts E1 to deenergize the speed relay V. The speed relay V opens its make contacts V1 to introduce the resistor M31 in series with the field winding 16F of the generator 16. The reduction in the energization of the field winding results in the slowing of the elevator car A to a landing speed.

The continued approach of the elevator car A at reduced speed toward the third floor brings the inductor stopping relay F into alignment with the inductor plate UFP for the third floor. This completes a magnetic circuit which results in opening of the break contacts F1 to deenergize the up switch U and the running relay M.

The up switch U opens its make contacts U1 to deenergize the brake coil 17 and permit reapplication of the spring-applied elevator brake. In addition, contacts U2 and U3 open to deenergize the generator field winding and the elevator car A consequently stops accurately at the third floor. Opening of the make contacts U4 and U5 and closure of the break contacts U6 have no immediate etfect on the operation of the system.

The deenergization of the running relay M results in opening of the make contacts M1 to deenergize the relays G, E, F and these relays consequently reset without immediately afiecting the operation of the system. Opening of the make contacts M2 has no immediate etfect on the operation of the system.

Opening of the make contacts M3 results in deenergiza- 12 tion of the non-interference relay T and this relay now starts to time out. The time delay and drop out of the relay 70T should be sutficient to permit normal discharge or entry of passengers relative to the elevator car A.

Opening of the make contacts M4 interrupts the circuit for the car-call stopping relay T. As the elevator car A stops at the third floor, the brush aa passes slightly beyond the contact segment A3. Closure of the break contacts MS has no immediate effect on the operation of the system.

Referring to Fig. 3 it will be observed that the opening of the make contacts M6 is accompanied by deenergization of the door-controlled relay 45. As shown in Fig. 4, the deenergization of the relay 45 connects the motor 22M for energization with proper polarity to open the door 22 of the elevator car A. The opening of the door is accompanied by opening of the switch 22S to deenergize the door safety relay DR (Fig. 1). The door safety relay DR opens its make contacts DR1 without immediately afiecting the operation of the system.

It will be assumed that the passenger in the elevator car A now leaves. Upon the expiration of its time delay, the non-interference relay 70T drops out to initiate a starting operation of thhe elevator car A from the third floor in the same manner discussed with reference to the starting of the elevator car from the first floor.

The elevator car A now proceeds upwardly toward the tenth floor. As it approaches the tenth floor the brush gg (Fig. 3) reaches the contact segments glO for the tenth floor. Under the assumed condition no call is registered requiring travel of the elevator car A above the tenth floor. Consequently, the engagement of the contact segment gilt) by the brush gg completes the following circuit:

L1, llDRZ, MCRZ, IGURZ, git), gg, W7, 1, 1S2, L2

The energized high call reversal relay I now closes its make contacts 11 (Fig. l) to complete with the make contacts M1 an energizing circuit for the relays G,'E and F. These relays operate to initiate the slow down and stopping of the elevator car at the tenth floor by the same sequence discussed for the stopping of the elevator car at the third floor.

In addition, the high-call reversal relay 3 opens its break contacts I2. Consequently, when the car stops and the make contacts M2 open, the tip-direction relay W is deenergized. As the result of its deenergization the up-direction relay W opens its make contacts V 1, W4 (Fig. 2), W5, W6 and W7 (Fig. 3) without immediately affecting the operation of ti e system. The closure of the break contacts W2 (Fig. l) completes an energizing circuit for the down-direction relay X to condition the elevator car for operation in the down direction. This relay thereupon closes its make contacts X1 and opens its break contacts X2 without immediately affecting the operation of the system.

The make contacts X3 in Fig. 2 close, but slightly before such closing both of the contacts W3 and X3 are momentarily open, and such opening results in resetting of the car-call registering relay 3CR. This relay opens its make contacts BCRP. and closes its make contacts 3CR2 (Fig. 3) without immediately affecting the operation of the system.

The down-direction relay also closes its make contacts X4 and X5 to further prepare the elevator car A for down travel.

By reference to Fig. 2 it will be noted that the closure of the make contacts X6 completes the following circuit:

L1, lliDRi, ltiDRN, cit), ee, X6,M5,IS1, L2

The energization of the cancelling coil IODRN resets the down-floorcall registering relay ltlDR. This relay opens its make contacts lhDRi and closes its break contacts 10DR2 (Fig. 3) and MDRZS without immediately affecting the operation of the system.

It will now be assumed that the prospective passenger car call by operating the push button 1C for the first fioor. Asa result of such operation, the car-call registering I 'rgiza'ti-on 'through the make relay ICR is cohnected' for eh contacts X3. The energ Upon the expiration ofits drop'out time, the non interference relay 70T"(-Fi"g. -'1)"dro'ps' out to close its break contacts 70T2 (Fig. 3). This results in closure of the door-of the elevatorcar Airit'he manner previously de scribed." Such closure is accompanied by'energization of the door safety-relay DR (Fig 1') and this relay closes itsmake contactsDRlf I The relay 70T also"closes'its 'break contacts" 70T1 to complete the following circuit when the 'make contacts DR! closer- 1:1,,70T1, X 1, 1 2, 24, D, M, DR1,L2

The down switch D closes its make contacts D1 to release the elevator brake. In addition, make contacts D2 and D3 close to energize the field winding 16F with proper polarity for down travel of the elevator car. Closure of'the make contacts D l completes with the switch 21 and the break' con tacts E2 an energizing circuit for the's'peed relay V. This? relay closes its make contacts Vii to'shunt the"resistor REl. Consequently, the field Winding 16F nowds' energized to produce full speed travel of the'elevator car in the down direction,

Closure of'the make contacts D5 establishes a holding circuit around the contacts 70T1 and Xl. Opening of the break contacts D6 asno immediate effect on the operation ofthesystem." v The running relay closes'its make contacts M1 and M2 without immediately affecting the operation of the system. Closure of the make contacts M3 energizes and picks up the non-interference relay 70T. Closure of the make contacts M4 '(Fig'."2),"opening of the break contacts M5 and closure of the make contacts M6 (Fig. 3) has no immediate" 'eite'cto'n'the operation of the system.

The energized non-interference relay 70T opens its breakco'ntacts" 7011 (Fig. 1 and 7012 (Fig. 3) without iminediatelyaitectiiig the operation of the system.

The elevator car Ai'riow'p'roceeds down towardsthe first 'fioor. "As the elevator car nears the first floor the brush bb' engagesthe contactsegment b (Fig. 2) to complete the'following circuit: i R i As a result of its energization,the car-call stopping relay T closes its make 'cont'acts T1 (Fig. l) to complete with the make contacts Ml an energizing circuit for the relays G, E and Fi'-'-*The"rela y G establishes a holding circuit around thehontacts T1 by closing its make contactsGl. I

As a result of further approach toward the first floor by the elevatorcar'Af the inductor slow-down relay E comes into alignment with the inductor plate DEP for the first 'fi'oor'. This completes a magnetic circuit which results-in opening of'the breakcontacts E2 to deenergize the speed relay V. The speed'relay V opens its make contacts V1 to introduce" the resistor RBI in series with the generator field winding'16F. The reduction in energizationof the field wi'ndingslows the elevator car A to a landing speed.

The further approach of the elevator car A to the first floor brings-the inductor stopp ingrelay F into alignment with the inductor plate DFP for the first floor. This completes a magnetic circuit which results in opening of the break "contacts'FZtodeenergize the down switch D and therunning relay M.

The down switch D o'p'en's its make contacts D1 to deenergize the brakacoil 17 and permit reapplication of the spring-applied brake. In addition, the make contacts 14 D2 and D3 open to deenergize the field winding 16F. The elevator car A now stops accurately at the first floor. fIhedoyvn.switeh alsgropen its makecontacts-Dt and pswithdut [imr'iiediatel afie M system." The closure contacts lCRl tostablish holdingcircuitaround the relay-1G."

. s an d ens fti hpns its i makecontacts'Mlto deenergiz the relays G, E and F and these, m y; consequently., reset without;immediate effect on the operation of the system. Openingof make "cOntactsMZ hasno immediate ;eifect .on the operation of The opening or the, [contacts in deem ergization of the non-interference relay 70T and this relay starts to timeout.

' ithe"energizing circuit for the car-call stopping relay. It will be assumed further that asthe elevator tearstops thefbrush bb ment v wt; Closing of the breaklcontacts M5 endopeninggfithe Pa e. sl .b il a nt make contacts'M7 (Fig.3) have no immediate effect on the operation of the system.

' and this 'relay' operatesjn the manner previouslydisswitches 21", z tgt'nd'zs (Fig. 1 open and the limit of the system. I

switches 33 (Fig. 3) and Q35 alsoopen. Theopening of these limit switches has no effect on the operation of the system with thee xceptio n that theopening of the .limit switch 26 (Fig. 1) 'de energizes the dov n-directi lilelay X. This relayIopens its make contacts X1 withoutimmediately affecting'the operation of the system. 'I-lowe'ver closure of the break contacts X2 completes th e following circuitz I H I,

' .1. We L2.

Opening of the make contacts X3 (Fig. 2) occurs shortly before the. .make contacts W3 close and consequently, the car-call registering relay lQlfi resetsto open its make contacts ..Qpeningofth rnake contacts 4, .X5'andX6-h Theup directioi relay 1s. now. energ zed and loses its make'icontac ts W1,- opens its break contacts W2, closes its ake contact ,W (F g- WiwWS, W6,:, d,=;W (Fig. 3). tam-spare the elevator cantonup travel Next'it wilI be assumed that both of the,elevatoncars A and B are providing non-attendant elevatorservice and that'both of the elevator cars A andB are displaced from the first floor when the switch lifi (Fig.;,3). is operatedto dee nergize the bank transferrelay N. In response tmits deenergization, the bank. transfer. relay opens its-make contacts N1 and N2. However, the car .transfer relays TR and BTR continue I tov be energized through ,their associated holding circuits; Attendants are. present ion the first floor for thepurpose of entering theelevator cars when they are placed on attendant operation. f

The elevators continue in non-attendant;.operatiomin the manner set forth in the. precedingjdiscussion until the elevator cars reach the first floor. Itwill be assumed that the elevator carA is the first to reachthefirst n gr.

As the elevator car A reaches and stops at thefirs't floor in the manner discussed above, the limit switch 35 (Fig. 3) opens to deenergize the car transfer relay TR. This relay closes its break contacts TRl (Figl-) to maintain the energization of the non-interference relay T. Consequently, the non-interference. relay: 70T is. nolonger under the control of the. running relay contacts M3.

Since the non-interference. relay 70T- is continuously energized, thebreak contacts- 70T remain open andgno not control the energization of the relays U, D- and; M,-,,-- In addition, the breakcontacts 70T2 (Fig. 3) remainopen and do not exercise control over the door control relayAS.

The car transfer relay TR also closes its break contacts TR2 (Fig. l) to place the manual start relay 86) under the control of the car switch 808.

In this case, when the car attendant desires to move the elevator car A from any floor at which it is stopped, he operates the car switch 805 to complete with the contacts TRZ an energizing circuit for the manual start relay 80. This relay closes its make contacts 8ll2 (Fig. 3) to complete with the switch 31 an energizing circuit for the door control relay 45. This relay operates in the manner previously discussed to close the elevator car door.

' In addition, the manual start relay 80 closes its make contacts 891. Since these contacts are in parallel with the contacts 70T1, they operate in the manner previously discussed for the contacts 70T1 to start the elevator car from a floor at which it is stopped. Consequently, the operation of the car transfer relay TR places the elevator car A under the control of the manual start relay 8% rather than under the control of the non-interference relay 70T1. It should be noted that the transfer of the elevator car A does not occur until the elevator car reaches the first floor.

It will be assumed that shortly after the elevator car A reaches the first floor, the elevator car B reaches the first floor. In an analogous manner the elevator car B on reaching the first floor opens the switch B35 (Fig. 3) to interrupt the holding circuit for the car transfer relay BTR. This relay closes its break contacts BTRI (Fig. 1) to maintain a continuous energizing circuit for the non-interference relay B70T. In addition the break contacts BTR2 close to place the manual start relay B80 under the control of the car switch B808. Thereafter the starting of the elevator car B from the first floor is under the control of the car attendant through operation of the car switch B805 rather than under the control of the non-interference relay B70T.

If desired, make contacts (not shown) of the running relays M and BM may be employed for shunting the limit switches 35 and B35 respectively in the same manner illustrated for the limit switches 33 and B33.

The sequence for removing one of the elevator cars from service now will be considered. It will be assumed that both of the elevator cars A and B are providing automatic operation and that both of the elevator cars are displaced from the first floor. At this stage the switch 32 (Fig. 3) is opened for the purpose of removing the elevator car A from service.

Since the elevator car A is displaced from the first floor, the limit switch 33 is closed and the in-service switch IS continues to be energized through the switch 33 and the contacts 183. When the elevator car A reaches and stops at the first floor, it opens the switch 33 and the contacts M7 to interrupt the energization of the in-service switch IS. The in-service switch now opens its make contacts 181 (Fig. 2) to prevent response of the elevator car to registered floor calls. In addition, make contacts 182 (Fig. 3) open to prevent energization of the high-call reversal relay J. Opening of the make contacts IS3 prevents energization of the in-service switch IS until the manually-operable switch 32 again is operated.

Opening of the make contacts 184 has no immediate effect on the operation of the system for the reason that the car transfer relay TR continues to be energized through its holding circuit.

The elevator car A continues in non-attendant operation until it reaches the first floor and opens the switch 35 to deenergize the car transfer relay TR. This relay operates in the manner previously discussed to close its break contacts TRl (Fig. l) for the purpose of continuously energizing the non-interference relay 1 0T. It also closes its break contacts TR2 to place the manual start relay 80 under the control of the car switch 363. Consequently, the starting of the elevator car from a floor at which it is stopped now is initiated by operation of til) 16 the car switch 808 by the car attendant who enters the elevator car A at the first floor.

It should be noted that although the elevator car A does not respond to registered floor calls, it does respond to registered car calls. Consequently, the elevator car A is now under the full control of the car attendant.

Although the invention has been described with reference to certain specific embodiments thereof, numerous modifications falling within the spirit and scope of the invention are possible. Consequently, the specific embodiments herein disclosed are to be interpreted in an illustrative rather than in a limiting sense.

We claim as our invention:

1. In an elevator system, a structure having a plurality of floors including a transfer floor at which a transfer operation is to be effective, an elevator car, means mounting the elevator car for movement relative to the structure to serve the floors, motive means for moving the elevator car relative to the structure, control means operable for controlling the motive means to move the elevator car relative to the structure and to stop the elevator car at predetermined floors, automatic operating means for automatically initiating an operation of the control means, manual operating means for initiating an operation of the control means, and transfer means selectively operable for transferring the control means from control by one to control by the other of said operating means, said transfer means being effective after an operation thereof to complete said transferring only when the elevator car is adjacent said transfer floor regardless of the position of the elevator car at the time the transfer means is operated.

2. In an elevator system, a structure having a plurality of floors including a transfer floor at which a transfer operation is to be effective, an elevator car, means mounting the elevator car for movement relative to the structure to serve the floors, motive means for moving the elevator car relative to the structure, call registering means for registering calls for floors served by the elevator car, control means operable in cooperation with the motive means and the call registering means for moving the elevator car and for stopping the elevator car at floors for which calls are registered by the call registering means, automatic operating means for operating the control means to initiate movement of the elevator caraway from a floor at which it is stopped, manual operating means actuable from within the elevator car for operating the control means to initiate movement of the elevator car away from a floor at which it is stopped, and transfer means manually operable for transferring the control means from control by one to control by the other of said operating means, said transfer means permitting completion of said transferring only when the elevator car is stopped at said transfer floor regardless of the position of the elevator car at the time the transfer means is operated.

3. In an elevator system, a structure having a plurality of floors, an elevator car, means mounting the elevator car for movement relative to the structure to serve the floors, motive means for moving the elevator car relative to the structure, call registering means for registering calls for floors served by the elevator car, control means operable in cooperation with the motive means and the call registering means for moving the elevator car and for stopping the elevator car at floors for which calls are registered by the call registering means, time-responsive means for operating the control means to initiate movement of the elevator car away from a floor at which it is stopped, manual operating means actuable from within the elevator car for operating the control means to initiate movement of the elevator car away from a floor at which it is stopped, and transfer means manually operable for transferring initiation of operation of the control means from control by the time-responsive means to control by said manual operating means, said transfer means including means permittin completion of said transferrin nnlv 17 when the elevator car is adjacent a predetermined one of the floors.

4. In an elevator system, a structure having a plurality of floors, an elevator car, means mounting the elevator car for movement relative to the structure to serve the floors, motive means for moving the elevator car relative to the structure, first call registering means operable within the elevator car for registering calls for floors served by the elevator car, second call registering means operable from the floors served by the elevator car for registering calls for elevator service, control means operable in cooperation with the motive means and the call registering means for moving the elevator car and for stopping the elevator car at floors for which calls are registered by the call registering means, time-responsive means for operating the control means to initiate movement of the elevator car away from a floor at which it is stopped, manual operating means actuable from within the elevator car for operating the control means to initiate movement of the elevator car away from a floor at which it is stopped, and transfer means manually operable for transferring initiation of operation of the control means from control by the time-responsive means to control by said manual operating means, said transfer means including means permitting completion of said transferring only when the elevator car is stopped at a predetermined one of the floors and means responsive to such transferring for modifying the response of the elevator car to calls registered by the call registering means.

5. In an elevator system, a structure having a plurality of floors, an elevator car, means mounting the elevator car for movement relative to the structure to serve the floors, motive means for moving the elevator car relative to the structure, control means operable for controlling the motive means to move the elevator car relative to the structure and to stop the elevator car at predetermined floors, first operating means for controlling the control means in accordance with a first mode of operation, second operating means for controlling the control means in accordance with a second mode of operation, said elevator car in each of said modes being conditioned to stop at predetermined floors while set for travel in the given direction with the elevator car serving only one of the floors at each stop of the elevator car, and transfer means elfective for transferring the control means from control by one to control by the other of said operating means only when the elevator car occupies substantially a predetermined position relative to the structure.

6. In an elevator system, a structure having a plurality of floors, a plurality of elevator cars, means mounting the elevator cars for movement relative to the structure to serve the floors, motive means for moving the elevator cars relative to the structure, control means operable for controlling the motive means to move the elevator cars relative to the structure and to stop the elevator cars at predetermined floors of the structure, automatic operating means for automatically initiating an operation of the control means to move each of the elevator cars from one of the floors of the structure at which the associated elevator car has stopped, manual operating means operable within each of the elevator cars for initiating an operation of the control means to move the associated elevator car from one of the floors of the structure at which such last-named associated elevator car has stopped, and transfer means selectively operable for transferring the control means from one to the other of said operating means, said transfer means being effective to complete said transferring of one of the elevator cars only when such last-named elevator car is adjacent a predetermined one of the floors.

7. In an elevator system, a structure having a plurality of floors, a plurality of elevator cars, means mounting the elevator cars for movement relative to the structure to serve the floors, motive means for moving the elevator cars relative to the structure, first call registering means operable within each of the elevator cars for registering calls for floors served by the associated elevator car, second call registering means operable from the floors for registering calls for floors served by the elevator cars, control means operable in cooperation with the motive means and the call registering means for moving each of the elevator cars and for stopping each of the elevator cars at each of the floors approached by the elevator car for which a call is registered by the call registering means which may be answered by such elevator car, automatic operating means for automatically initiating operation of the control means to move each of the elevator cars from one of the floors at which the elevator car has stopped, manual operating means operable within each of the elevator cars for initiating an operation of the control means to move the associated elevator car from one of the floors of the structure at which such last-named elevator car has stopped, and transfer means selectively operable for transferring the control means from one to the other of said operating means for at least one of the elevator cars, said transfer means being effective to complete said transferring of one of the elevator cars only when the last-named elevator car is stopped at a predetermined one of the floors.

8. In an elevator system, a structure having a plurality of floors, a plurality of elevator cars, means mounting the elevator cars for movement relative to the structure to serve the floors, motive means for moving the elevator cars relative to the structure, first call registering means operable within each of the elevator cars for registering calls for floors served by the associated elevator car, second call registering means operable from the floors for registering calls for floors served by the elevator cars, control means operable in cooperation with the motive means and the call registering means for moving each of the elevator cars and for stopping each of the elevator cars at each of the floors approached by the elevator car for which a call is registered by the call registering means which may be answered by such elevator car, automatic operating means for automatically initiating operation of the control means to move each of the elevator cars from one of the floors at which the elevator car has stopped, manual operating means operable within each of the elevator cars for initiating an operation of the control means to move the associated elevator car from one of the floors of the structure at which such last-named elevator car has stopped, and transfer means selectively operable for transferring the control means from one to the other of said operating means for all of the elevator cars, said transfer means being effective to complete said transferring of any of said elevator cars only when the elevator car-to-be-transferred is stopped at a predetermined one of the floors.

9. In an elevator system, a structure having a plurality of floors, a plurality of elevator cars, means mounting the elevator cars for movement relative to the structure to serve the floors, motive means for moving the elevator cars relative to the structure, first call registering means operable within each of the elevator cars for registering calls for floors served by the associated elevator car, second call registering means operable from the floors for registering calls for floors served by the elevator cars, control means operable in cooperation with the motive means and the call registering means for moving each of the elevator cars and for stopping each of the elevator cars at each of the floors approached by the elevator car for which a call is registered by the call registering means which may be answered by such elevator car, automatic operating means for automatically initiating operation of the control means to move each of the elevator cars from one of the floors at which the elevator car has stopped, manual operating means operable within each of the elevator cars for initiating an operation of the control means to move the associated elevator car from one of the floors of the structure at which such last-named elevator car has stopped, transfer means selectively operable for transferring the control means from one to the other of said operating means for all of the elevator cars, auxiliary transfer means operable in cooperation with the first-named transfer means for transferring the control means from one to the other of said operating means for certain only of the elevator cars, said transfer means being effective to complete said transferring of any of said elevator cars only when the elevator car-to-be-transferred is stopped at a predetermined one of the floors.

10. In an elevator system, a structure having a plurality of floors, a plurality of elevator cars, means mounting the elevator cars for movement relative to the structure to serve the floors, motive means for moving the elevator cars relative to the structure, first call registering means operable within each of the elevator cars for registering calls for floors served by the associated elevator car, second call registering means operable from the floors for registering calls for floors served by the elevator cars, control means operable in cooperation with the motive means and the call registering means for moving each of the elevator cars and for stopping each of the elevator cars at each of the floors approached by the elevator car for which a call is registered by the call registering means which may be answered by such elevator car, time-responsive operating means for automatically initiating operation of the control means to move each of the elevator cars from one of the fioors at which the elevator car has stopped, manual operating means operable within each of the elevator cars for initiating an operation of the control means to move the associated elevator car from one of the floors of the structure at which such last-named elevator car has stopped, and transfer means selectively operable for transferring the control means from control by the time-responsive operating means to control by said manual operating means, said transfer means including means permitting completion of said transferring only when the elevator car is stopped at a predetermined one of the floors.

11. In an elevator system, a structure having a plurality of floors, a plurality of elevator cars, means mounting the elevator cars for movement relative to the structure to serve the floors, motive means for moving the elevator cars relative to the structure, first call registering means operable within each of the elevator cars for registering calls for floors served by the associated elevator car,

second call registering means operable from the fioors for registering calls for floors served by the elevator cars, control means operable in cooperation with the motive means and the call registering means for moving each of the elevator cars and for stopping each of the elevator cars at each of the floors approached by the elevator car for which a call is registered by the call registering means which may be answered by such elevator car, time-responsive operating means for automatically initiating operation of the control means to move each of the elevator cars from one of the floors at which the elevator car has stopped, manual operating means operable within each of the elevator cars for initiating an operation of the control means to move the associated elevator car from one of the floors of the structure at which such last-named elevator car has stopped, and transfer means selectively operable for transferring the control means from control by the time-responsive operating means to control by said manual operating means, said transfer means including means permitting completion of said transferring only when the elevator car is adjacent a predetermined one of the floors, and means responsive to said transferring for modifying the response of the elevator cars to calls registered by said call registering means.

12. In an elevator system, a structure having a plurality of floors, a plurality of elevator cars, means mounting the elevator cars for movement relative to the structure to serve the floors, motive means for moving the elevator cars relative to the structure, control means operable for controlling the motive means to move the elevator cars relative to the structure and to stop the elevator cars at predetermined fioors of the structure, first operating means for controlling the control means in accordance with a first pattern of operation, second operating means for controlling the control means in accordance with a second pattern of operation, each of said elevator cars in each of said patterns being conditioned to stop at predetermined floors while set for travel in a given direction with each of the elevator cars serving only one of the floors at each stop, and transfer means operable for transferring the control means from control by the first operating means to control by the second operating means, said transfer means being effective for said transferring for each of the elevator cars as each of the elevator cars reaches a predetermined position relative to the structure.

No references cited. 

